Ukraine has said seven people have been killed and six more injured in a drone attack on a Russian ship.
The Sergei Kotov – a patrol ship in the Black Sea – was said to have been hit in the early hours of Tuesday morning, and Ukrainian military intelligence said it suffered damage to the stern as well as its right and left sides.
And, while the Kremlin has yet to comment, some Russian bloggers have confirmed that the vessel has sunk.
The BBC has not been able to independently verify the extent of damage to the ship.
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